Chimney-cowl



CHIMNEY GOWL.

No. 441,236. Patented Nov. 25, 1890.

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UNITED STATES ATENT OFFICE.

FRANK A. GIRA AND FRANK J. ASTERLIN, OF BELLEVUE, OHIO.

CHHVINEY.COWL.

SPECIFICATION forming part of Letters Patent No. 441,236, dated November25, 1890.

Application filed June 10, 1890 To all whom, it may concern:

Be it known that we, FRANK A. GIRA and FRANK J. ASTERLIN, citizens ofthe United States, residing at Bellevue, in the county of Huron andState of Ohio, have invented certain new and useful Improvements inChimney-Cowls; and we do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it ap pertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

This invention relates to chimney-cowls.

The purpose of the invention is to prevent back-draft in chimneys orfines and obviate the inconvenience experienced by smoke and gas beingblown into the room or apartment.

A further object of the invention is to increase the draft in chimneysor fines and to guard against the counter-currents, which are the chiefsource of back-draft in chimneys and ilues.

A still further object of the invention is to exclude rain and snow fromthe chimney and protect the pipe therein (provided said chimney or iiueis used for heating by hot air) from water, which causes the said pipeto rust out in a short time.

The improvement consists in a cap which is fitted on the top of thechimney or flue, and which is closed in at its sides and top, save acentral opening at the top of the cap, from which extends a short tube.A hood extends over this tube, tapering from the bottom to the top, andhaving its base portion flaring and curving in opposite directions. Asecond hood, larger and similarly constructed to the rst-mentionedhood,is placed over the aforesaid hood and is arranged relatively atright angles thereto.

The improvement also consists of the peculiar construction andcombination of the parts, which will be hereinafter more fully describedand claimed, and which are shown in the accompanying drawings, in which-Figure 1 is a perspective View of a chimney-cowl constructed inaccordance with our invention. Fig. 2 is a vertical central section atright angles to Fig. l. Fig, 3 is a horizon- Serial No. 354,864. (Nomodel.)

tal section, just above the cap, on the linea@ x of Fig. 2.

The cowl is composed of the cap A, having the short tube a, and the twohoods B and C, which are placed over the short tube a and are disposedat right angles relative to each other. The cap has an exterior flanged. at its lower edge and avertical rim e depending from the outer edgeof the said flange d. The ange CZ is intended to rest on the top of thechimney or fine, and the rim e is designed to embrace the sides of thesaid chimney near the top thereof and hold the cap from lateraldisplacement and preserve a close joint between it and the chimney. Thatportion of the cap above the flange (l forms a prolongation of thechimney. The closed end of the cap is centrally apertured, and-from thisapj erture projects vertically the tube a.

The hoods B and C are similarly constructed, but different as to size,the hood B being smaller than the hood C, and the smaller being arrangedwithin the larger. These hoods taper from the base to ltheir upper endsand curve in opposite directions at their lower.

ends, as shown most clearly in Fig. 3. The hood B is placed over thetube a and is sufliciently large to permit a free circulation between itand the upper end of the said tube. The hood C, considerably larger thanthe hood B, is placed over the hood B in such a manner that the closedsides thereof come directly opposite the open sides of the hood B.Obviously the closed sides of the hoodB come opposite the open sides ofthe hood C. It will be observed that the hoods Hare at their lower ends,which ends are secured to the top of the cap.

The operation of the invention is as follows: The cowl is secured to thechimney in the manner aforesaid, and is secured thereto in any suitableand Well-known manner. In the event of the wind blowing at right anglesto the hood C a vacuum will be created in the same and cause a suctionin the chimney, thereby increasing the draft. Upon the IOO chimney.Should the wind blow from any point and at any angle between the pointsaforesaid, it will strike the inner side of the hood C and will bedeflected at right angles across the open sides of the hood B, with theresult aforesaid of increasing the draft in the chimney. Hence it willbe seen that it matters not from which point of the compass the wind isblowing, as the effect will be the same to increase the draft in thechimney.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. A chimney-cowl comprising a cap apertured as described and twooppositely-disposed hoods, one hood placed within the other, withrounded tops and a space entirely surrounding the inner one, saidhoodsbeing contracted at their upper ends and haring at their lowerends, which vends are Wider than the top of the hoods and curve inopposite directions, substantially as specified.

2. The hereinbefore-specied chimney cowl, comprising the cap A, havingthe eXterior flange d at its lower edge and the rim e depending from theouter edge of the ange and having a short tube a projecting from anaperture in its top, and the two hoods B and C, placed over the tube atright angles to each Other and having their upper ends contracted andtheir lower ends expanded and flaring and curved in opposite directions,the hoodB being the smaller and arranged within the hood C,substantially as described, and for the purpose specified.

In testimony whereof we aiiix our signatures in presence of twowitnesses.

FRANK A. GIRA. FRANK J. ASTERLIN.

Witnesses:

J oHN J. LYNCH, JAMES M. LYNCH.

